Aerosol fuel injector cleaner

• US 5,091,017 A
• Filed: 11/17/1989
• Issued: 02/25/1992
• Est. Priority Date: 04/18/1988
• Status: Expired due to Fees

• Current Assignee: Hi-Port Aerosol, Inc.
• Original Assignee: Aerosol Systems, Inc.
• Inventors: Flanner, Lloyd T.
• Primary Examiner(s): Pal, Asok
• Application Number:
  US07/438,710
• Time in Patent Office: 830 Days
• Field of Search: 134/22.11, 134/22.12, 134/22.14, 134/24, 134/36, 252/305, 252/90
• US Class Current: 510/185
• CPC Class Codes: B65D 83/14 for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02M 65/008 of injectors only

Abstract

A method and canister for cleaning engine fuel injectors which includes connecting the injectors to a canister containing an aerosol formulation comprising a liquid cleaner and a compressed air propellant, and thereafter forcing the cleaner through the injectors to remove contaminating deposits therefrom. The canister also uses a conduit for transferring the formulation from the canister to the internal combustion engine. The compressed air serves both as a combustion oxidant, as well as the propellant for the cleaner. In addition to including a material capable of dissolving injector contaminants, the cleaner may include as components thereof detergents, dispersants, detergent and dispersant solvents, lubricants, and other substances useful in cleaning processes.

Claims

1. A canister containing an aerosol formulation consisting essentially of a liquid cleaner composition, and oxygen bearing compressed air propellant, said air having an initial pressure from about 25 to about 110 pounds per square inch, gauge, measured at 70°

F., and said liquid cleaner being present in an amount such that it occupies from about 25% to about 90%, on a volume basis, of the volume of said canister.

2. The canister according to claim 1 wherein said liquid cleaner includes as a component thereof a substance comprising a member selected from the group consisting of aliphatic compounds, cyclic compounds, their substituted derivatives, and mixtures thereof.

3. The canister according to claim 2 wherein said cleaner includes as additional components thereof at least one member of each of the group comprising a detergent material, a dispersant material, and a solvent for such materials.

4. A canister according to claim 1 wherein said cleaner includes an aromatic hydrocarbon, a detergent, a dispersant, and a solvent for said detergent and said dispersant.

5. A canister according to claim 1 wherein said canister has a volume of from about 8 to 32 fluid ounces.

6. The canister of claim 1 further comprising a transfer means for controllably transferring said liquid cleaner from said canister to the fuel rail of an internal combustion engine.

7. The canister of claim 6 wherein said transfer means comprises a hydrocarbon-resistant pressure hose.

8. The canister of claim 6 wherein said transfer means further comprises a pressure gauge.

9. The canister of claim 6 wherein said transfer means further comprises a means for regulating pressure from said canister.